1. 
2. 
[syn: amok, amuck, murderously]
The Collaborative International Dictionary of English v.0.48:
Murderous \Mur"der*ous\, a.
   Of or pertaining to murder; characterized by, or causing,
   murder or bloodshed; having the purpose or quality of murder;
   bloody; sanguinary; as, the murderous king; murderous rapine;
   murderous intent; a murderous assault. "Murderous coward."
   --Shak. -- Mur"der*ous*ly, adv.
   [1913 Webster]
   Syn: Bloody; sanguinary; bloodguilty; bloodthirsty; fell;
        savage; cruel.
        [1913 Webster]
WordNet (r) 3.0 (2006):
murderously
    adv 1: as if bent on murder; "the huge dog bore down on them
           with bared fangs and barking murderously"
    2: in a murderous frenzy; "rioters running amuck and throwing
       sticks and bottles and stones" [syn: amok, amuck,
       murderously]